Imaging catheter, tip, tube body, and medical device

Abstract

Embodiments of the present invention provide an imaging catheter, a tip, a tube body, and a medical device, relating to the field of medical devices. The imaging catheter includes a tube body and a tip. The tube body includes a first shuttle wall and a second shuttle wall, and a first channel is formed between the first shuttle wall and the second shuttle wall. The tip includes a first mounting wall and a second mounting wall, and a second channel is formed between the first mounting wall and the second mounting wall. The second channel communicates with the first channel, and the proximal end of the first mounting wall corresponds to the position between the first shuttle wall and the second shuttle wall. The radial distance between point m and point n is a, and the inner diameter of the first channel is b, where a ≥ b to eliminate the drop, so that the instrument can enter the second channel from the first channel. The imaging catheter is compatible with instruments having a large outer diameter range, enabling more types of instruments to enter the second channel from the first channel.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly, to an imaging catheter, a tip, a tube body, and a medical device. Background Art

[0002] The biliary direct vision subscope system of the duodenal endoscope has been gradually recognized by the market. Some studies have shown that compared with ERCP, the incidence of complications of the biliary subscope system has not increased, further confirming its safety. Compared with the traditional ERCP surgery, the biliary subscope system can observe the lesions and stones in the biliary tract through its built-in camera, greatly improving the accuracy of the treatment of biliary diseases. When using the biliary subscope system clinically, surgical instruments can be used in cooperation through its working channel, so as to perform surgical treatment. However, the types of surgical instruments compatible with the existing working channels are relatively few. Summary of the Invention

[0003] The objectives of the present invention include, for example, providing an imaging catheter that can effectively improve the above-mentioned technical problems.

[0004] The objectives of the present invention include, for example, providing a tip that can effectively improve the above-mentioned technical problems.

[0005] The objectives of the present invention include, for example, providing a tube body that can effectively improve the above-mentioned technical problems.

[0006] The objectives of the present invention also include, for example, providing a medical device including the above-mentioned imaging catheter, or including the above-mentioned tip, or including the above-mentioned tube body.

[0007] The embodiments of the present invention can be implemented as follows:

[0008] An embodiment of the present invention provides an imaging catheter, including a tube body and a tip. The tube body includes a first shuttle wall and a second shuttle wall. The first shuttle wall and the second shuttle wall are distributed along the radial direction of the tube body, and a first channel is formed between the first shuttle wall and the second shuttle wall;

[0009] The tip includes a first mounting wall and a second mounting wall. The first mounting wall and the second mounting wall are distributed along the radial direction of the tip, and a second channel is formed between the first mounting wall and the second mounting wall;

[0010] The proximal end of the first mounting wall and the proximal end of the second mounting wall are respectively docked with the distal end of the first shuttle wall and the distal end of the second shuttle wall, so that the second channel communicates with the first channel. Moreover, the proximal end of the first mounting wall corresponds to the space between the first shuttle wall and the second shuttle wall, such that there is a height difference between the proximal end of the first mounting wall and the distal end of the first shuttle wall;

[0011] The radial distance between point m and point n is a, and the inner diameter of the first channel is b, where a ≥ b, to eliminate the height difference, so that the instrument can enter the second channel from the first channel;

[0012] Wherein, point m is the proximal end point of the first mounting wall, and point n is a point on the proximal end of the second mounting wall or the distal end of the second shuttle wall. Along the axial direction of the tube body, point n is closer to the proximal end of the tube body than point m.

[0013] Optionally, along the axial direction of the head, the proximal end face of the first mounting wall is aligned with the proximal end face of the second mounting wall, and along the axial direction of the tube body, the distal end face of the first shuttle wall is aligned with the distal end face of the second shuttle wall. The axial direction of the tube body is the same as the axial direction of the head.

[0014] Optionally, the proximal end of the second mounting wall is provided with a first notch connected to the second channel, the distal end of the second shuttle wall is provided with a second notch communicating with the first channel, the proximal end of the first notch communicates with the distal end of the second notch, and point n is located in the area corresponding to the second notch.

[0015] Optionally, the head includes a body and an extension portion. The distal end of the extension portion is connected to the proximal end of the body, and the proximal end of the extension portion is connected to the distal end of the tube body. The outer diameter of the extension portion is smaller than the outer diameter of the body, such that a stepped structure is formed between the extension portion and the body;

[0016] The second channel passes through both the extension portion and the body at the same time. The proximal end of the first mounting wall, the proximal end of the second mounting wall, and the first notch are all provided on the extension portion.

[0017] Optionally, the second mounting wall includes a transition wall. The distal end of the head has an outlet for the instrument to pass through from the second channel. The proximal end of the transition wall extends to the distal end of the first notch, and the distal end of the transition wall extends to the outlet. The transition wall is used to change the movement direction of the instrument so that the instrument passes through the outlet.

[0018] Optionally, the imaging catheter further includes a fixing ring. The distal end of the fixing ring is sleeved on the proximal outer wall of the head end, and the proximal end of the fixing ring is sleeved on the distal outer wall of the tube body, so that the tube body and the head end are relatively fixed, and the fixing ring is used to close the first notch and the second notch.

[0019] Optionally, a guiding surface is provided on the proximal wall surface of the first mounting wall, and the guiding surface is used to guide the instrument passing through the first channel into the second channel.

[0020] Optionally, the figure obtained by intercepting the guiding surface with a reference plane is a first straight line inclined relative to the central axis of the head end. Along the direction from the proximal end to the distal end of the first straight line, the radial distance from the first straight line to the second mounting wall gradually decreases, where the reference plane is a plane passing through the central axis.

[0021] Optionally, the distal end of the head end is provided with an outlet for the instrument to pass through the second channel. The figure obtained by intercepting the outer contour of the outlet with the reference plane is a second straight line inclined relative to the central axis. The inclination direction of the second straight line relative to the central axis is opposite to the inclination direction of the first straight line relative to the central axis, and the guiding surface is used to guide the instrument located in the second channel to pass through the outlet.

[0022] Optionally, the proximal end point of the guiding surface coincides with the proximal end point of the first mounting wall.

[0023] Optionally, the tube body includes a single-chamber tube and a metal wire mesh tube, and the multi-chamber tube is sleeved inside the metal wire mesh tube.

[0024] Optionally, the tube body further includes a third shuttle wall and a fourth shuttle wall. The first shuttle wall, the second shuttle wall, the third shuttle wall, and the fourth shuttle wall are distributed along the radial direction of the tube body, and a third channel is formed between the third shuttle wall and the fourth shuttle wall;

[0025] The head end further includes a third mounting wall and a fourth mounting wall. The first mounting wall, the second mounting wall, the third mounting wall, and the fourth mounting wall are distributed along the radial direction of the head end, and a fourth channel is formed between the third mounting wall and the fourth mounting wall;

[0026] The proximal end of the third mounting wall is docked with the distal end of the third shuttle wall, and the proximal end of the fourth mounting wall is docked with the distal end of the fourth shuttle wall, so that the fourth channel is communicated with the third channel;

[0027] Wherein, the inner diameter of the fourth channel is greater than that of the third channel, such that the proximal ends of the fourth mounting wall and the first mounting wall both correspond to the region between the first shuttle wall and the second shuttle wall.

[0028] Optionally, the imaging catheter further includes a camera and a wire. The camera is mounted within the fourth channel, and the wire passes through the third channel and the fourth channel and is connected to the camera.

[0029] An embodiment of the present invention provides a head for assembling with a tube body. The tube body includes a first shuttle wall and a second shuttle wall. The first shuttle wall and the second shuttle wall are distributed radially along the tube body. A first channel is formed between the first shuttle wall and the second shuttle wall. The head includes a first mounting wall and a second mounting wall. The first mounting wall and the second mounting wall are distributed radially along the head. A second channel is formed between the first mounting wall and the second mounting wall;

[0030] The proximal ends of the first mounting wall and the second mounting wall are respectively used for docking with the distal ends of the first shuttle wall and the second shuttle wall, so that the second channel communicates with the first channel, and the proximal end of the first mounting wall is used to correspond to the region between the first shuttle wall and the second shuttle wall, such that there is a drop between the proximal end of the first mounting wall and the distal end of the first shuttle wall;

[0031] The radial distance between point s and point t is c, and the inner diameter of the first channel is d. Wherein, c≥d to eliminate the drop, so that the instrument can enter the second channel from the first channel;

[0032] Wherein, point s is the proximal end point of the first mounting wall, point t is the proximal end point of the second mounting wall, and along the axial direction of the head, point s is closer to the distal end of the head than point t.

[0033] Optionally, a first notch communicating with the second channel is provided at the proximal end of the second mounting wall. The first notch is used to face the second shuttle wall, so that the first notch communicates with the first channel, and point t is located within the region corresponding to the first notch.

[0034] Optionally, the head includes a body and an extension portion. The distal end of the extension portion is connected to the proximal end of the body. The proximal end of the extension portion is used to be connected to the distal end of the tube body. The outer diameter of the extension portion is smaller than the outer diameter of the body, such that a stepped structure is formed between the extension portion and the body;

[0035] The second channel runs through both the extension part and the body, and the proximal end of the first mounting wall, the proximal end of the second mounting wall, and the first notch are all provided on the extension part.

[0036] Optionally, the distal end of the first notch extends to the body so that the distal end of the first notch corresponds to the second channel, and the proximal end of the first notch is used to correspond to the first channel.

[0037] Optionally, the second mounting wall includes a transition wall. The distal end of the head has an outlet for the instrument to pass through the second channel. The proximal end of the transition wall extends to the distal end of the first notch, and the distal end of the transition wall extends to the outlet. The transition wall is used to change the movement direction of the instrument so that the instrument passes through the outlet.

[0038] Optionally, a guiding surface is provided on the proximal wall surface of the first mounting wall. The guiding surface is used to guide the instrument passing through the first channel into the second channel.

[0039] Optionally, the figure obtained by intercepting the guiding surface with a reference plane is a first straight line inclined relative to the central axis of the head. Along the direction from the proximal end to the distal end of the first straight line, the radial distance from the first straight line to the second mounting wall gradually decreases, where the reference plane is a plane passing through the central axis.

[0040] Optionally, the distal end of the head has an outlet for the instrument to pass through the second channel. The figure obtained by intercepting the outer contour of the outlet with the reference plane is a second straight line inclined relative to the central axis. The inclination direction of the second straight line relative to the central axis is opposite to the inclination direction of the first straight line relative to the central axis. The guiding surface is used to guide the instrument located in the second channel to pass through the outlet.

[0041] Optionally, the proximal end point of the guiding surface coincides with the proximal end point of the first mounting wall.

[0042] Optionally, the tube body further includes a third shuttle wall and a fourth shuttle wall. The first shuttle wall, the second shuttle wall, the third shuttle wall, and the fourth shuttle wall are distributed along the radial direction of the tube body, and a third channel is formed between the third shuttle wall and the fourth shuttle wall;

[0043] The head further includes a third mounting wall and a fourth mounting wall. The first mounting wall, the second mounting wall, the third mounting wall, and the fourth mounting wall are distributed along the radial direction of the head, and a fourth channel is formed between the third mounting wall and the fourth mounting wall;

[0044] The proximal end of the third mounting wall is used to dock with the distal end of the third shuttle wall, and the proximal end of the fourth mounting wall is used to dock with the distal end of the fourth shuttle wall, so that the fourth channel communicates with the third channel;

[0045] Wherein, the inner diameter of the fourth channel is larger than that of the third channel, such that the proximal ends of the fourth mounting wall and the first mounting wall both correspond to the space between the first shuttle wall and the second shuttle wall.

[0046] An embodiment of the present invention provides a tube body for assembling with a head end. The head end includes a first mounting wall and a second mounting wall. The first mounting wall and the second mounting wall are distributed radially along the head end. A second channel is formed between the first mounting wall and the second mounting wall. The tube body includes a first shuttle wall and a second shuttle wall. The first shuttle wall and the second shuttle wall are distributed radially along the tube body. A first channel is formed between the first shuttle wall and the second shuttle wall;

[0047] The distal ends of the first shuttle wall and the second shuttle wall are respectively used to dock with the proximal ends of the first mounting wall and the second mounting wall, so that the first channel communicates with the second channel, and the proximal end of the first mounting wall is used to correspond to the space between the first shuttle wall and the second shuttle wall, such that there is a drop between the proximal end of the first mounting wall and the distal end of the first shuttle wall;

[0048] The distance between point x and point y is e, and the inner diameter of the first channel is f, wherein e≥f to eliminate the drop, so that the instrument can enter the second channel from the first channel;

[0049] Wherein, point x is the proximal end point of the first mounting wall, point y is the distal end point of the second shuttle wall, and along the axial direction of the tube body, point y is closer to the proximal end of the tube body than point x.

[0050] Optionally, a second notch communicating with the first channel is provided at the distal end of the second shuttle wall. The second notch is used to face the first mounting wall so that the second notch communicates with the second channel, and point y is located in the area corresponding to the second notch.

[0051] Optionally, the tube body includes a metal wire mesh tube and a multi-channel tube, and the multi-channel tube is sleeved inside the metal wire mesh tube.

[0052] Optionally, the distal end of the multi-channel tube extends out of the distal end of the single-channel tube.

[0053] Optionally, the head further includes a third mounting wall and a fourth mounting wall. The first mounting wall, the second mounting wall, the third mounting wall, and the fourth mounting wall are distributed radially along the head. A fourth channel is formed between the third mounting wall and the fourth mounting wall;

[0054] The tube body further includes a third shuttle wall and a fourth shuttle wall. The first shuttle wall, the second shuttle wall, the third shuttle wall, and the fourth shuttle wall are distributed radially along the tube body. A third channel is formed between the third shuttle wall and the fourth shuttle wall;

[0055] The distal end of the third shuttle wall is adapted to be docked with the proximal end of the third mounting wall, and the distal end of the fourth shuttle wall is adapted to be docked with the proximal end of the fourth mounting wall, so that the third channel communicates with the fourth channel;

[0056] Wherein, the inner diameter of the third channel is smaller than the inner diameter of the fourth channel, such that the proximal end of the fourth mounting wall and the proximal end of the first mounting wall both correspond to the space between the first shuttle wall and the second shuttle wall.

[0057] An embodiment of the present invention provides a medical device, including the imaging catheter according to any one of the foregoing embodiments, or the head according to any one of the foregoing embodiments, or the tube body according to any one of the foregoing embodiments. Both the tube body and the head are sleeved within the forceps channel of the endoscope.

[0058] The beneficial effects of the imaging catheter, the head, the tube body, and the medical device according to the embodiments of the present invention include, for example:

[0059] An embodiment of the present invention further provides an imaging catheter. The first channel communicates with the second channel. At the same time, the radial distance between point m and point n is greater than or equal to the inner diameter of the first channel, such that an instrument having the same outer diameter as the inner diameter of the first channel can also enter the second channel from the first channel, and the drop between the first mounting wall and the first shuttle wall can be eliminated. Thus, the imaging catheter can be compatible with instruments having a larger outer diameter, that is to say, the range of outer diameters of the instruments that the imaging catheter can be compatible with is larger, such that more types of instruments can enter the second channel from the first channel.

[0060] An embodiment of the present invention provides a head. After the head is cooperated with the tube body, the first channel communicates with the second channel. At the same time, the radial distance between point s and point t is greater than or equal to the inner diameter of the first channel, such that an instrument having the same outer diameter as the inner diameter of the first channel can also enter the second channel from the first channel, and the drop between the first mounting wall and the first shuttle wall can be eliminated. Thus, after using the head in cooperation with the tube body, it can be compatible with instruments having a larger outer diameter, that is to say, the range of outer diameters of the instruments that can be compatible with is larger, such that more types of instruments can enter the second channel from the first channel.

[0061] An embodiment of the present invention further provides a tube body. After the tube body is mated with a tip, a first channel communicates with a second channel. At the same time, the distance between point x and point y is greater than or equal to the inner diameter of the first channel, so that an instrument with an outer diameter the same as the inner diameter of the first channel can also enter the second channel from the first channel, and the drop between the first mounting wall and the first shuttle wall can be eliminated. In this way, when using the tube body in cooperation with the tip, instruments with larger outer diameters can be compatible, that is to say, the range of outer diameters of compatible instruments is larger, so that more types of instruments can enter the second channel from the first channel.

[0062] An embodiment of the present invention further provides a medical device, which includes the imaging catheter mentioned above, or includes the tip mentioned above, or includes the tube body mentioned above. This medical device can be compatible with instruments with larger outer diameters, so that more types of instruments can enter the second channel from the first channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0064] Figure 1 Structural schematic diagram of an imaging catheter in the related art provided by an embodiment of the present invention;

[0065] Figure 2 Structural schematic diagram of the first imaging catheter provided by an embodiment of the present invention;

[0066] Figure 3 Structural schematic diagram of an instrument passing through the first imaging catheter in the first state provided by an embodiment of the present invention;

[0067] Figure 4 Structural schematic diagram of an instrument passing through the first imaging catheter in the second state provided by an embodiment of the present invention;

[0068] Figure 5 Structural schematic diagram of an instrument passing through the first imaging catheter in the third state provided by an embodiment of the present invention;

[0069] Figure 6 Structural schematic diagram of the first imaging catheter with the fixing ring removed provided by an embodiment of the present invention;

[0070] Figure 7 Structural schematic diagram of the first tip in the first perspective provided by an embodiment of the present invention;

[0071] Figure 8 Schematic diagram of the structure of the first end head provided by the embodiment of the present invention from the second perspective;

[0072] Figure 9 Schematic diagram of the structure of the first end head provided by the embodiment of the present invention from the third perspective;

[0073] Figure 10 Schematic diagram of the structure of the first pipe body provided by the embodiment of the present invention from the first perspective;

[0074] Figure 11 Schematic diagram of the structure of the first pipe body provided by the embodiment of the present invention from the second perspective;

[0075] Figure 12 Schematic diagram of the structure of the first pipe body provided by the embodiment of the present invention from the third perspective;

[0076] Figure 13 Schematic diagram of the structure of the multi - cavity pipe provided by the embodiment of the present invention;

[0077] Figure 14 Schematic diagram of the instrument passing through the second imaging catheter provided by the embodiment of the present invention;

[0078] Figure 15 is Figure 14 The enlarged schematic diagram at position D in;

[0079] Figure 16 Schematic diagram of the structure of the second end head provided by the embodiment of the present invention;

[0080] Figure 17 Schematic diagram of the structure of the third end head provided by the embodiment of the present invention;

[0081] Figure 18 Schematic diagram of the structure of the second pipe body provided by the embodiment of the present invention;

[0082] Figure 19 Schematic diagram of the structure of the third pipe body provided by the embodiment of the present invention;

[0083] Figure 20 Schematic diagram of the structure of the connection between the third pipe body and the end head provided by the embodiment of the present invention.

[0084] Icon: 1 - Imaging catheter; 11 - Tip; 111 - First mounting wall; 112 - Second mounting wall; 1121 - Transition wall; 113 - Third mounting wall; 114 - Fourth mounting wall; 115 - Second channel; 116 - Fourth channel; 117 - First notch; 118 - Body; 119 - Extension; 120 - Outlet; 121 - Guiding surface; 122 - Fifth channel; 123 - Sixth channel; 13 - Tube body; 131 - First shuttle wall; 132 - Second shuttle wall; 133 - Third shuttle wall; 134 - Fourth shuttle wall; 135 - First channel; 136 - Third channel; 137 - Second notch; 138 - Metal mesh tube; 139 - Multi - lumen tube; 140 - Metal mesh; 141 - Seventh channel; 142 - Eighth channel; 15 - Camera; 16 - Wire; 17 - Fixed ring; 3 - Instrument. Detailed implementation mode

[0085] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0086] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0087] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0088] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0089] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0090] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0091] In the related art, an imaging catheter shuttles in the forceps channel of an endoscope. The imaging catheter can observe the lesions and stones in the biliary tract through a built-in camera. Moreover, a surgical instrument can shuttle in the working channel of the imaging catheter, and the staff can operate the surgical instrument correspondingly according to the images captured by the camera for surgical treatment.

[0092] Please refer to Figure 1 , specifically, the imaging catheter includes a tube body 13, a head 11, a camera 15 and a wire 16. The tube body 13 includes a first shuttle wall 131, a second shuttle wall 132, a third shuttle wall 133 and a fourth shuttle wall 134. The first shuttle wall 131, the second shuttle wall 132, the third shuttle wall 133 and the fourth shuttle wall 134 are distributed along the radial direction of the tube body 13. A first channel 135 is formed between the first shuttle wall 131 and the second shuttle wall 132, and a third channel 136 is formed between the third shuttle wall 133 and the fourth shuttle wall 134.

[0093] Please refer to Figure 1 , the head 11 includes a first mounting wall 111, a second mounting wall 112, a third mounting wall 113 and a fourth mounting wall 114. The first mounting wall 111, the second mounting wall 112, the third mounting wall 113 and the fourth mounting wall 114 are distributed along the radial direction of the head 11. A second channel 115 is formed between the first mounting wall 111 and the second mounting wall 112, and a fourth channel 116 is formed between the third mounting wall 113 and the fourth mounting wall 114.

[0094] Please refer to Figure 1 , after the head 11 is connected to the tube body 13, the first channel 135 is communicated with the second channel 115 to form a working channel for the instrument 3 ( Figure 3 shown in) to pass through. The third channel 136 is communicated with the fourth channel 116 to form a camera channel for accommodating the camera 15 and the wire 16.

[0095] Specifically, please refer to Figure 1 , the fourth channel 116 is used to accommodate the camera 15. The wire 16 passes through the third channel 136 and the fourth channel 116 and is connected to the camera 15. Generally, the outer diameter of the camera 15 is larger than the outer diameter of the wire 16. Therefore, the inner diameter of the fourth channel 116 is larger than the inner diameter of the third channel 136, so that the proximal ends of the first mounting wall 111 and the fourth mounting wall 114 both correspond to between the first shuttle wall 131 and the second shuttle wall 132, and there is a drop between the proximal end of the first mounting wall 111 and the distal end of the first shuttle wall 131, so as to Figure 1Regarding the relative positions described, the proximal end of the first mounting wall 111 is below the distal end of the first shuttle wall 131. As a result, the distal end of the second shuttle wall 132 corresponds to the area between the first mounting wall 111 and the second mounting wall 112, creating a height difference between the second shuttle wall 132 and the second mounting wall 112, so as to Figure 1 Regarding the relative positions described, the distal end of the second shuttle wall 132 is above the proximal end of the second mounting wall 112. In this way, when an instrument 3 with a larger outer diameter shuttles through the first channel 135, the instrument 3 is not easily passed through the area between the proximal end of the first mounting wall 111 and the distal end of the second shuttle wall 132, that is Figure 1 the area position between j and k in

[0096] An imaging catheter 1 and a medical device provided in this embodiment can effectively improve the above technical problems. Specifically, please refer to Figures 2 - 6 , the medical device includes an imaging catheter 1 and an instrument 3. The imaging catheter 1 includes a tip 11 and a tube body 13. The tube body 13 includes a first shuttle wall 131 and a second shuttle wall 132. The first shuttle wall 131 and the second shuttle wall 132 are distributed along the radial direction of the tube body 13, and a first channel 135 is formed between the first shuttle wall 131 and the second shuttle wall 132.

[0097] The tip 11 includes a first mounting wall 111 and a second mounting wall 112. The first mounting wall 111 and the second mounting wall 112 are distributed along the radial direction of the tip 11, and a second channel 115 is formed between the first mounting wall 111 and the second mounting wall 112.

[0098] The proximal ends of the first mounting wall 111 and the second mounting wall 112 are respectively docked with the distal ends of the first shuttle wall 131 and the second shuttle wall 132, so that the second channel 115 is communicated with the first channel 135.

[0099] A first notch 117 connected to the second channel 115 is provided at the proximal end of the second mounting wall 112, and a second notch 137 communicated with the first channel 135 is provided at the distal end of the second shuttle wall 132. The proximal end of the first notch 117 is communicated with the distal end of the second notch 137.

[0100] Please refer to Figure 2, point m is the proximal end point of the first mounting wall 111. Point n is located within the area corresponding to the second notch 137. The radial distance between point m and point n is a. Along the axial direction of the tube body 13, point n is closer to the proximal end of the tube body 13 relative to point m. The inner diameter of the first channel 135 is b, and a≥b. In this way, the height difference between the second shuttle wall 132 and the second mounting wall 112 can be eliminated. After the instrument 3 reaches the distal end of the first channel 135, the second notch 137 has a space to accommodate the instrument 3, and the instrument 3 can move a certain distance towards the second notch 137. Moreover, the first notch 117 also has a space to accommodate the instrument 3, enabling the instrument 3 with an outer diameter the same as the inner diameter of the first channel 135 to still enter the second channel 115 from the first channel 135.

[0101] Therefore, the imaging catheter 1 can be compatible with the instrument 3 having an outer diameter the same as the inner diameter of the first channel 135. Of course, the imaging catheter 1 can also be compatible with the instrument 3 having an outer diameter smaller than the inner diameter of the first channel 135. That is to say, the imaging catheter 1 can be compatible with a wider range of outer diameters of the instrument 3 and can be compatible with more types of instruments 3.

[0102] It should be noted that in this embodiment, the axial direction of the tube body 13 is the same as the axial direction of the head 11, and the radial direction of the tube body 13 is the same as the radial direction of the head 11. The radial distance referred to in this embodiment can be the distance along the radial direction of the head 11 or the distance along the radial direction of the tube body 13.

[0103] It should be noted that in other embodiments, the first notch 117 may not be provided on the second mounting wall 112, and the second notch 137 may not be provided on the second shuttle wall 132. Point n can be a point on the proximal end of the second mounting wall 112 or the distal end of the second shuttle wall 132, which will be described in detail later.

[0104] In this embodiment, the instrument 3 can be: sampling forceps, basket, snare, etc. The staff can perform corresponding surgical treatments with the aid of the instrument 3.

[0105] It is worth noting that the proximal end and the distal end referred to in this article are referenced with respect to the staff using the device. During use, the end relatively closer to the staff is the proximal end, and the end relatively farther from the staff is the distal end. For example: in Figure 3 , the left end of the tube body 13 is the proximal end, the right end of the tube body 13 is the distal end, the left end of the head 11 is the proximal end, and the right end of the head 11 is the distal end.

[0106] It should be noted that in this embodiment, along the axial direction of the end head 11, the proximal end faces of the first mounting wall 111 and the second mounting wall 112 are aligned, and along the axial direction of the tube body 13, the distal end faces of the first shuttle wall 131 and the second shuttle wall 132 are aligned. In this way, after the tube body 13 is connected to the end head 11, the first notch 117 and the second notch 137 are arranged opposite to each other, the proximal end face of the first notch 117 is attached to the distal end face of the second notch 137, and a receiving space for receiving the instrument 3 is formed by splicing between the first notch 117 and the second notch 137, facilitating the movement of the instrument 3.

[0107] Of course, in other embodiments, the tube body 13 and the end head 11 can also be integrally formed. In this way, the first notch 117 and the second notch 137 can form a through hole.

[0108] It can be understood that in this embodiment, along the radial direction of the tube body 13, the second notch 137 penetrates through the second shuttle wall 132, and along the radial direction of the end head 11, the first notch 117 penetrates through the second mounting wall 112. In this way, the influence of the wall thickness of the second shuttle wall 132 and the second mounting wall 112 can be eliminated, enabling the instrument 3 with a larger outer diameter to more easily enter the second cavity 115 from the first cavity 135.

[0109] Please refer to Figures 2 - 5 , in this embodiment, the tube body 13 further includes a third shuttle wall 133 and a fourth shuttle wall 134. The first shuttle wall 131, the second shuttle wall 132, the third shuttle wall 133, and the fourth shuttle wall 134 are distributed along the radial direction of the tube body 13, and a third cavity 136 is formed between the third shuttle wall 133 and the fourth shuttle wall 134.

[0110] The end head 11 further includes a third mounting wall 113 and a fourth mounting wall 114. The first mounting wall 111, the second mounting wall 112, the third mounting wall 113, and the fourth mounting wall 114 are distributed along the radial direction of the end head 11, and a fourth cavity 116 is formed between the third mounting wall 113 and the fourth mounting wall 114.

[0111] The proximal end of the third mounting wall 113 is docked to the distal end of the third shuttle wall 133, and the proximal end of the fourth mounting wall 114 is docked to the distal end of the fourth shuttle wall 134. In this way, the fourth cavity 116 can be communicated with the third cavity 136.

[0112] It should be noted that in this embodiment, the "butt joint" of the two ends can be understood as that along the axial direction of the end 11 or the pipe body 13, the end faces of the two ends are aligned, and along the radial direction of the end 11 or the pipe body 13, the end faces of the two ends can be in contact or spaced apart from each other. For example, the proximal end of the third mounting wall 113 is butted against the distal end of the third shuttle wall 133, which means that along the axial direction of the end 11 or the pipe body 13, the proximal end face of the third mounting wall 113 is aligned with the distal end face of the third shuttle wall 133, and along the radial direction of the end 11 or the pipe body 13, the proximal end face of the third mounting wall 113 abuts against the distal end face of the third shuttle wall 133. And the proximal end of the fourth mounting wall 114 is butted against the distal end of the fourth shuttle wall 134, which means that along the axial direction of the end 11 or the pipe body 13, the proximal end face of the fourth mounting wall 114 is aligned with the distal end face of the fourth shuttle wall 134, and along the radial direction of the end 11 or the pipe body 13, there is a spaced arrangement between the proximal end face of the fourth mounting wall 114 and the distal end face of the fourth shuttle wall 134.

[0113] In this embodiment, since the inner diameter of the fourth channel 116 is larger than the inner diameter of the third channel 136, the proximal ends of the fourth mounting wall 114 and the first mounting wall 111 both correspond to the space between the first shuttle wall 131 and the second shuttle wall 132.

[0114] In this embodiment, the imaging catheter 1 further includes a camera 15 and a wire 16. The wire 16 is threaded through the third channel 136 and the fourth channel 116 and is connected to the camera 15 in the fourth channel 116. It should be noted that the fourth channel 116 houses the camera 15, while the third channel 136 houses the wire 16. Generally, the outer diameter of the camera 15 is larger than the outer diameter of the wire 16. Therefore, the inner diameter of the fourth channel 116 is larger than the inner diameter of the third channel 136.

[0115] It can be understood that in this embodiment, the staff can observe the pathological changes and stone conditions in the biliary tract with the help of the camera 15.

[0116] In this embodiment, the medical device further includes a handle assembly. One end of the wire 16 is connected to the camera 15, and the other end of the wire 16 is connected to the handle assembly. The staff can control the working state of the camera 15 through the handle assembly.

[0117] Please refer to Figures 2 - 5, in this embodiment, the imaging catheter 1 further includes a fixing ring 17. The distal end of the fixing ring 17 is sleeved on the proximal outer wall of the head 11, and the proximal end of the fixing ring 17 is sleeved on the distal outer wall of the tube body 13. In this way, the tube body 13 and the head 11 can be relatively fixed. Moreover, after the fixing ring 17 is sleeved on the tube body 13 and the head 11, the fixing ring 17 can close the first notch 117 and the second notch 137, preventing the instrument 3 from passing through the first notch 117 and the second notch 137, avoiding the instrument 3 passing through from the wrong position and affecting the normal progress of the operation.

[0118] Please refer to Figures 6 - 9 , and in combination with Figures 2 - 5 , in this embodiment, the head 11 includes a body 118 and an extension 119. The distal end of the extension 119 is connected to the proximal end of the body 118, and the proximal end of the extension 119 is connected to the distal end of the tube body 13. The outer diameter of the extension 119 is smaller than the outer diameter of the body 118. In this way, a stepped structure is formed between the extension 119 and the body 118.

[0119] It should be noted that, in this embodiment, the distal end of the fixing ring 17 is directly sleeved on the extension 119, and the distal end face of the fixing ring 17 abuts against the proximal end face of the body 118, which is convenient for the installation and disassembly of the fixing ring 17.

[0120] In this embodiment, the body 118 and the extension 119 are integrally formed, and the second channel 115 penetrates through both the extension 119 and the body 118 at the same time. The proximal ends of the first mounting wall 111 and the second mounting wall 112 are both provided on the extension 119. Therefore, the first notch 117 is also provided on the extension 119. Specifically, the distal end of the first notch 117 extends to the body 118, which is convenient for the processing and manufacturing of the first notch 117.

[0121] Please refer to Figures 7 - 9 , and in combination with Figures 2 - 6 , in this embodiment, the second mounting wall 112 further includes a transition wall 1121. The distal end of the head 11 has an outlet 120 for the instrument 3 to pass through the second channel 115. The proximal end of the transition wall 1121 extends to the distal end of the first notch 117, and the distal end of the transition wall 1121 extends to the outlet 120.

[0122] It can be understood that the transition wall 1121 is provided between the first notch 117 and the outlet 120. In this way, when the instrument 3 enters the second channel 115, the transition wall 1121 has a limiting effect on the instrument 3. By operating the proximal end of the instrument 3, the doctor can smoothly adjust the position of the distal end of the instrument 3 under the action of the transition wall 1121, so as to facilitate the instrument 3 to pass through the outlet 120 of the second channel 115.

[0123] Of course, in other embodiments, the transition wall 1121 may not be provided between the first notch 117 and the outlet 120, that is to say, the distal end of the first notch 117 and the outlet 120 may also be directly connected.

[0124] It should be noted that, please refer to Figure 9 and in combination with Figures 2 - 5 , since the proximal end of the first mounting wall 111 corresponds to the position between the first shuttle wall 131 and the second shuttle wall 132, when the instrument 3 enters the second channel 115 from the distal end of the first channel 135, it is easy to be abutted by the proximal end of the first mounting wall 111, making the process of the instrument 3 entering the second channel 115 from the first channel 135 not smooth. Therefore, in this embodiment, a guiding surface 121 is provided on the proximal wall surface of the first mounting wall 111, and this guiding surface 121 can guide the instrument 3 passing through the first channel 135 into the second channel 115, making the process of the instrument 3 entering the second channel 115 from the first channel 135 smoother.

[0125] Specifically, in this embodiment, please refer to Figure 9 and in combination with Figures 2 - 5 , the guiding surface 121 is an inclined surface, and the figure obtained by intercepting the guiding surface 121 with a reference plane is a first straight line inclined with respect to the central axis of the end 11. Along the direction from the proximal end of the first straight line to the distal end of the first straight line, the radial distance from the first straight line to the second mounting wall 112 gradually decreases, where the extending direction of the central axis of the end 11 is the axial direction of the end 11, the reference plane is a plane passing through the central axis, and the radial distance is the distance along the radial direction of the end 11.

[0126] It should be noted that the guiding surface 121 can not only effectively improve the problem of the unsmooth entry of the instrument 3 from the first channel 135 into the second channel 115, but also effectively reduce the wall thickness of the first mounting wall 111, making it more convenient for the instrument 3 with a larger outer diameter to enter the second channel 115.

[0127] It should be noted that, in this embodiment, the guiding surface 121 is disposed opposite to the first notch 117, and the first notch 117 has a space for accommodating the instrument 3. In this way, the guiding surface 121 can guide the instrument 3 to move towards the first notch 117, making it more convenient for the instrument 3 to enter the second channel 115.

[0128] In addition, please refer to Figures 7 - 9 and in combination with Figures 2 - 5 , in this embodiment, the figure obtained by intercepting the outer contour of the outlet 120 with a reference plane is a second straight line inclined with respect to the central axis of the end 11, and the inclination direction of the second straight line with respect to the central axis is opposite to the inclination direction of the first straight line with respect to the central axis.

[0129] In this way, under the action of the guiding surface 121, the distal end of the instrument 3 entering the second channel 115 can be directly aligned with the outlet 120, reducing the travel distance of the instrument 3 within the second channel 115, thereby enabling the instrument 3 to penetrate out of the outlet 120 more quickly.

[0130] It should be noted that in other embodiments, the figure obtained by intercepting the outer contour of the outlet 120 with a reference plane can also be an arc. Specifically, the concave side of the arc can face the second channel 115, or the convex side of the arc can face the second channel 115.

[0131] Generally, the distal surface of the instrument 3 is an arc surface. When the distal end of the instrument 3 abuts against the guiding surface 121, the guiding surface 121 can more easily change the movement direction of the instrument 3, aligning the front end of the instrument 3 with the outlet 120, and the movement of the instrument 3 along the guiding surface 121 can also be smoother.

[0132] It should be noted that in this embodiment, the proximal end point of the guiding surface 121 coincides with the proximal end point of the first mounting wall 111. In this way, when the instrument 3 enters the second channel 115 from the first channel 135, it can contact the guiding surface 121, and the guiding surface 121 can change the movement direction of the instrument 3 immediately. Moreover, such a setting method can further improve the smoothness of the instrument 3 entering the second channel 115 from the first channel 135.

[0133] It should be noted that if the movement direction of the instrument 3 within the second channel 115 deviates and moves towards the second mounting wall 112, the transition wall 1121 can change the movement direction of the instrument 3, aligning the distal end of the instrument 3 with the outlet 120 again. That is to say, in this embodiment, the combination of the transition wall 1121 and the guiding surface 121 can make the movement process of the instrument 3 within the second channel 115 smoother, enabling the instrument 3 to penetrate out of the outlet 120 more quickly and effectively improving work efficiency.

[0134] In addition, please specifically refer to Figure 7 , in this embodiment, since the distal end face of the second channel 115 is an inclined plane, this can enlarge the diameter of the outlet 120, facilitating the penetration of the instrument 3.

[0135] Please refer to Figure 7 and Figure 8 , in this embodiment, the end 11 further has a fifth channel 122 for passing the traction wire. In the actual application process, the fifth channel 122 is sleeved outside the traction wire. Under the guiding action of the traction wire, the end 11 can reach the preset position along the extension direction of the traction wire.

[0136] It should be noted that in this embodiment, the number of the fifth channels 122 is four, and the four fifth channels 122 are respectively arranged at the four corners of the end head 11. Such an arrangement has a better guiding effect, so that when the end head 11 penetrates the traction wire, it is not easy to deviate from the normal track.

[0137] Please refer to Figure 7 and Figure 8 , in this embodiment, the end head 11 further includes a sixth channel 123 for allowing the injected liquid to pass through. The liquid flows out from the distal end of the sixth channel 123 and acts on the preset part to assist in surgical treatment. In this embodiment, the number of the sixth channels 123 is two, and the two sixth channels 123 are arranged oppositely and are respectively arranged on the opposite sides of the end head 11.

[0138] It should be noted that in this embodiment, since the distal end face of the end head 11 is an inclined plane, the diameters of the distal openings of the fifth channels 122 and the sixth channels 123 become larger, which is beneficial for the traction wire and the injected liquid to pass through.

[0139] It is worth noting that in this embodiment, the material of the end head 11 is selected as medical-grade 304 stainless steel, and then a machining or powder metallurgy integral forming process is adopted. In other embodiments, the material of the end head 11 can also be selected as a hard plastic material such as PEEK.

[0140] Please refer to Figures 10 - 13 , and in combination with Figures 2 - 5 , in this embodiment, the tube body 13 includes a metal network tube 138 and a multi-channel tube 139, and the multi-channel tube 139 is sleeved inside the metal network tube 138.

[0141] It should be noted that the multi-channel tube 139 itself is a flexible tube. By sleeving the metal network tube 138 on the outer wall of the multi-channel tube 139, the strength and stiffness of the multi-channel tube 139 can be enhanced.

[0142] In this embodiment, the metal network tube 138 is formed by melting a single-channel tube and a metal mesh. Specifically, after the metal mesh 140 is sleeved on the outer wall of the multi-channel tube 139, the single-channel tube is sleeved on the outer wall of the metal mesh 140, and then through a melting process, the metal mesh 140 is formed inside the single-channel tube.

[0143] It should be noted that the above-mentioned first shuttle wall 131, second shuttle wall 132, third shuttle wall 133 and fourth shuttle wall 134 are all arranged on the multi-channel tube 139. Correspondingly, the above-mentioned first channel 135 and third channel 136 are also arranged on the multi-channel tube 139.

[0144] It is worth noting that please specifically refer to Figures 11 - 13, in this embodiment, the multi-lumen tube 139 further has a seventh lumen 141 for allowing the traction wire to pass through, and its specific function is the same as that of the fifth lumen 122 described above.

[0145] Specifically, in this embodiment, the distal end of the seventh lumen 141 communicates with the proximal end of the fifth lumen 122, and the number of the seventh lumens 141 is also four. The four seventh lumens 141 correspond to the four fifth lumens 122 one by one.

[0146] Please refer to Figures 11 - 13 , in this embodiment, the multi-lumen tube 139 further has an eighth lumen 142 for allowing the injected liquid to pass through, and its function is the same as that of the sixth lumen 123 described above. Specifically, in this embodiment, the distal end of the eighth lumen 142 communicates with the proximal end of the sixth lumen 123. The injected liquid enters from the proximal end of the eighth lumen 142, then enters the sixth lumen 123 from the distal end of the eighth lumen 142, and finally is output from the distal end of the sixth lumen 123. The number of the eighth lumens 142 is the same as that of the sixth lumens 123, which is also two, and the two eighth lumens 142 correspond to the two sixth lumens 123 one by one.

[0147] It should be noted that the multi-lumen tube 139 can be an integrally formed part or can be spliced by multiple materials.

[0148] Please refer to Figure 14 and Figure 15 , in other embodiments, the first notch 117 and the second notch 137 may not be provided on the second shuttle wall 132 and the second mounting wall 112, but the outer diameter of the instrument 3 can also enter the second lumen 115 smoothly from the first lumen 135 by reducing the wall thickness of the second shuttle wall 132 and the second mounting wall 112.

[0149] Specifically, as Figure 14 and Figure 15 shown, at this time, point n is located on the second shuttle wall 132, m is the proximal end point of the first mounting wall 111, the radial distance between point m and point n is a, along the axial direction of the tube body 13, point n is closer to the proximal end of the tube body 13 than point m, the inner diameter of the first lumen 135 is b, and a≥b. In this way, when the outer diameter of the instrument 3 is equal to the inner diameter of the first lumen 135, the instrument 3 entering the first lumen 135 can also enter the second lumen 115 from the first lumen 135, which can also make the outer diameter range of the instruments 3 compatible with the imaging catheter 1 larger, so as to be compatible with more types of instruments 3.

[0150] Please refer to Figure 16 , Figure 16Schematic diagram of the second end 11 provided in this embodiment. The structure of the second end 11 is mostly the same as that of the first end 11 described above. The difference lies in that along the axial direction of the end 11, the proximal end of the first mounting wall 111 is closer to the distal end of the end 11 than the proximal end of the second mounting wall 112.

[0151] In this way, when Figure 16 the end 11 in is connected to the tube body 13, the first notch 117 formed on the second mounting wall 112 faces the second shuttle wall 132, so that the proximal end of the first notch 117 communicates with the first channel 135, the distal end of the first notch 117 communicates with the second channel 115, and the first notch 117 has a space capable of accommodating the instrument 3. As Figure 16 shown, the point s is the proximal end point of the first mounting wall 111, the point t is located in the area corresponding to the first notch 117. Along the axial direction of the end 11, the point s is closer to the distal end of the end 11 than the point t, the radial distance between the point s and the point t is c, and the inner diameter of the first channel 135 is d, and c≥d. In this way, the instrument 3 with the same outer diameter as the inner diameter of the first channel 135 can also enter the second channel 115 through the junction of the first channel 135 and the second channel 115, and it can also make the range of the outer diameters of the instruments 3 compatible with the imaging catheter 1 larger, so as to be compatible with more types of instruments 3.

[0152] Of course, please refer to Figure 17 . In other embodiments, Figure 16 as shown, the first notch 117 may not be provided on the second mounting wall 112 of the end 11, but by reducing the wall thickness of the second mounting wall 112, the instrument 3 with a larger outer diameter can smoothly enter the second channel 115 from the first channel 135.

[0153] Specifically, as Figure 17 shown, at this time, the point s is the proximal end point of the first mounting wall 111, the point t is located on the second mounting wall 112. Along the axial direction of the end 11, the point s is closer to the distal end of the end 11 than the point t, the radial distance between the point s and the point t is c, and the inner diameter of the first channel 135 is d, and c≥d. In this way, when the outer diameter of the instrument 3 is equal to the inner diameter of the first channel 135, the instrument 3 entering the first channel 135 can also enter the second channel 115 from the first channel 135, and it can also make the range of the outer diameters of the instruments 3 compatible with the imaging catheter 1 larger, so as to be compatible with more types of instruments 3.

[0154] Please refer to Figure 18 . Correspondingly, Figure 18Schematic diagram of the second type of tube body 13 provided in this embodiment. The structure of the second type of tube body 13 is mostly the same as that of the first type of tube body 13 described above. The difference is that along the axial direction of the tube body 13, the distal end of the first shuttle wall 131 is closer to the proximal end of the tube body 13 than the distal end of the second shuttle wall 132.

[0155] In this way, when Figure 18 the tube body 13 in is connected to the end head 11, the second notch 137 formed in the second shuttle wall 132 faces the second mounting wall 112, so that the proximal end of the second notch 137 communicates with the first channel 135, and the distal end of the second notch 137 communicates with the second channel 115. The second notch 137 has a space capable of accommodating the instrument 3. As Figure 18 shown, point x is the proximal end point of the first mounting wall, and point y is located in the area corresponding to the second notch 137. Along the axial direction of the tube body 13, point y is closer to the proximal end of the tube body 13 than point x. In this way, it is also possible to enable the instrument 3 located in the first channel 135 to enter the second channel 115 through the junction of the first channel 135 and the second channel 115.

[0156] Of course, please refer to Figure 19 , in other embodiments, Figure 18 as shown, the second notch 137 may not be provided on the second shuttle wall 132 of the tube body 13, but by reducing the wall thickness of the second shuttle wall 132, the instrument 3 with a larger outer diameter can smoothly enter the second channel 115 from the first channel 135.

[0157] Specifically, as Figure 19 and Figure 20 shown, at this time, point x is the proximal end point of the first mounting wall 111, and point y is located on the second shuttle wall 132. Along the axial direction of the tube body 13, point y is closer to the proximal end of the tube body 13 than point x. The radial distance between point x and point y is e, and the inner diameter of the first channel 135 is f, and e≥f. In this way, when the outer diameter of the instrument 3 is equal to the inner diameter of the first channel 135, the instrument 3 entering the first channel 135 can also enter the second channel 115 from the first channel 135. It is also possible to make the outer diameter range of the instrument 3 compatible with this imaging catheter 1 larger, so as to be compatible with more types of instruments 3.

[0158] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An imaging catheter, characterized in that, It includes a tube body and a head end. The tube body includes a first shuttle wall and a second shuttle wall. The first shuttle wall and the second shuttle wall are distributed radially along the tube body. A first channel is formed between the first shuttle wall and the second shuttle wall; The head end includes a first mounting wall and a second mounting wall. The first mounting wall and the second mounting wall are distributed radially along the head end. A second channel is formed between the first mounting wall and the second mounting wall; The proximal ends of the first mounting wall and the second mounting wall are respectively butted against the distal ends of the first shuttle wall and the second shuttle wall, so that the second channel communicates with the first channel. Moreover, the proximal end of the first mounting wall corresponds to the space between the first shuttle wall and the second shuttle wall, such that there is a drop between the proximal end of the first mounting wall and the distal end of the first shuttle wall; The radial distance between point m and point n is a, and the inner diameter of the first channel is b. Wherein, a≥b to eliminate the drop, so that the instrument can enter the second channel from the first channel; Wherein, point m is the proximal end point of the first mounting wall, and point n is a point on the proximal end of the second mounting wall or the distal end of the second shuttle wall. Along the axial direction of the tube body, point n is closer to the proximal end of the tube body than point m.

2. The imaging catheter according to claim 1, wherein Along the axial direction of the head end, the proximal end faces of the first mounting wall and the second mounting wall are aligned. Along the axial direction of the tube body, the distal end faces of the first shuttle wall and the second shuttle wall are aligned. The axial direction of the tube body is the same as the axial direction of the head end.

3. The imaging catheter according to claim 1, characterized in that, A first notch connected to the second channel is provided at the proximal end of the second mounting wall. A second notch communicating with the first channel is provided at the distal end of the second shuttle wall. The proximal end of the first notch communicates with the distal end of the second notch. Point n is located in the area corresponding to the second notch.

4. The imaging catheter according to claim 3, characterized in that, The head end includes a body and an extension part. The distal end of the extension part is connected to the proximal end of the body. The proximal end of the extension part is connected to the distal end of the tube body. The outer diameter of the extension part is smaller than the outer diameter of the body, such that a stepped structure is formed between the extension part and the body; The second channel penetrates through both the extension part and the body. The proximal end of the first mounting wall, the proximal end of the second mounting wall, and the first notch are all provided on the extension part.

5. The imaging catheter according to claim 3, wherein The second mounting wall includes a transition wall. The distal end of the head end has an outlet for the instrument to pass through from the second channel. The proximal end of the transition wall extends to the distal end of the first notch, and the distal end of the transition wall extends to the outlet. The transition wall is used to change the movement direction of the instrument so that the instrument passes through the outlet.

6. The imaging catheter according to claim 3, characterized in that, The imaging catheter further includes a fixing ring. The distal end of the fixing ring is sleeved on the proximal outer wall of the head end, and the proximal end of the fixing ring is sleeved on the distal outer wall of the tube body to relatively fix the tube body and the head end, and the fixing ring is used to close the first notch and the second notch.

7. The imaging catheter according to claim 1, characterized in that, A guiding surface is provided on the proximal wall surface of the first mounting wall, and the guiding surface is used to guide the instrument passing through the first channel into the second channel.

8. The imaging catheter according to claim 7, wherein, The figure obtained by intercepting the guiding surface with a reference plane is a first straight line inclined with respect to the central axis of the end. Along the direction from the proximal end to the distal end of the first straight line, the radial distance from the first straight line to the second mounting wall gradually decreases, wherein the reference plane is a plane passing through the central axis.

9. The imaging catheter according to claim 8, wherein The distal end of the end is provided with an outlet for the instrument to pass through the second channel. The figure obtained by intercepting the outer contour of the outlet with the reference plane is a second straight line inclined with respect to the central axis. The inclination direction of the second straight line with respect to the central axis is opposite to the inclination direction of the first straight line with respect to the central axis. The guiding surface is used to guide the instrument located in the second channel to pass through the outlet.

10. The imaging catheter according to claim 7, wherein The proximal end point of the guiding surface coincides with the proximal end point of the first mounting wall.

11. The imaging catheter according to any one of claims 1-10, characterized in that, The tube body includes a metal wire mesh tube and a multi-channel tube, and the multi-channel tube is sleeved inside the metal wire mesh tube.

12. The imaging catheter according to any one of claims 1-10, characterized in that, The tube body further includes a third shuttle wall and a fourth shuttle wall. The first shuttle wall, the second shuttle wall, the third shuttle wall, and the fourth shuttle wall are distributed along the radial direction of the tube body. A third channel is formed between the third shuttle wall and the fourth shuttle wall; The end further includes a third mounting wall and a fourth mounting wall. The first mounting wall, the second mounting wall, the third mounting wall, and the fourth mounting wall are distributed along the radial direction of the end. A fourth channel is formed between the third mounting wall and the fourth mounting wall; The proximal end of the third mounting wall is docked with the distal end of the third shuttle wall, and the proximal end of the fourth mounting wall is docked with the distal end of the fourth shuttle wall, so that the fourth channel is communicated with the third channel; Wherein, the inner diameter of the fourth channel is larger than the inner diameter of the third channel, so that the proximal ends of the fourth mounting wall and the first mounting wall both correspond to the space between the first shuttle wall and the second shuttle wall.

13. The imaging catheter according to claim 12, wherein The imaging catheter further includes a camera and a wire. The camera is installed in the fourth channel. The wire passes through the third channel and the fourth channel and is connected to the camera.

14. A terminal for assembling with a pipe body, the pipe body including a first shuttle wall and a second shuttle wall, the first shuttle wall and the second shuttle wall being distributed along the radial direction of the pipe body, a first channel being formed between the first shuttle wall and the second shuttle wall, characterized in that, The end includes a first mounting wall and a second mounting wall. The first mounting wall and the second mounting wall are distributed along the radial direction of the end. A second channel is formed between the first mounting wall and the second mounting wall; The proximal ends of the first mounting wall and the second mounting wall are respectively used to be docked with the distal ends of the first shuttle wall and the second shuttle wall, so that the second channel is communicated with the first channel. And the proximal end of the first mounting wall is used to correspond to the space between the first shuttle wall and the second shuttle wall, so that there is a height difference between the proximal end of the first mounting wall and the distal end of the first shuttle wall; The radial distance between point s and point t is c, and the inner diameter of the first channel is d, wherein c≥d to eliminate the height difference, so that the instrument can enter the second channel from the first channel; Among them, point s is the proximal end point of the first mounting wall, point t is located on the proximal part of the second mounting wall, and along the axis of the head, point s is closer to the distal end of the head than point t.

15. The end according to claim 14, characterized in that, A first notch communicating with the second channel is provided at the proximal end of the second mounting wall. The first notch is used to face the second shuttle wall so that the first notch communicates with the first channel, and point t is located within the area corresponding to the first notch.

16. The end according to claim 15, characterized in that, The head includes a body and an extension. The distal end of the extension is connected to the proximal end of the body. The proximal end of the extension is used to connect to the distal end of the tube body. The outer diameter of the extension is smaller than the outer diameter of the body, so that a stepped structure is formed between the extension and the body. The second channel penetrates through both the extension and the body at the same time. The proximal end of the first mounting wall, the proximal end of the second mounting wall, and the first notch are all provided on the extension.

17. The end according to claim 16, wherein The distal end of the first notch extends to the body so that the distal end of the first notch corresponds to the second channel, and the proximal end of the first notch is used to correspond to the first channel.

18. The end according to claim 15, characterized in that, The second mounting wall includes a transition wall. The distal end of the head has an outlet for the instrument to pass through the second channel. The proximal end of the transition wall extends to the distal end of the first notch, and the distal end of the transition wall extends to the outlet. The transition wall is used to change the movement direction of the instrument so that the instrument passes through the outlet.

19. The end head according to any one of claims 14-18, characterized in that, A guiding surface is provided on the proximal wall surface of the first mounting wall. The guiding surface is used to guide the instrument passing through the first channel into the second channel.

20. The end according to claim 19, characterized in that, The figure obtained by intercepting the guiding surface with a reference plane is a first straight line inclined with respect to the central axis of the head. Along the direction from the proximal end to the distal end of the first straight line, the radial distance from the first straight line to the second mounting wall gradually decreases. Among them, the reference plane is a plane passing through the central axis.

21. The end according to claim 20, characterized in that, The distal end of the head has an outlet for the instrument to pass through the second channel. The figure obtained by intercepting the outer contour of the outlet with the reference plane is a second straight line inclined with respect to the central axis. The inclination direction of the second straight line with respect to the central axis is opposite to the inclination direction of the first straight line with respect to the central axis. The guiding surface is used to guide the instrument located in the second channel to pass through the outlet.

22. The end according to claim 19, wherein The proximal end point of the guiding surface coincides with the proximal end point of the first mounting wall.

23. The end head according to any one of claims 14-18, characterized in that, The tube body further includes a third shuttle wall and a fourth shuttle wall. The first shuttle wall, the second shuttle wall, the third shuttle wall, and the fourth shuttle wall are distributed along the radial direction of the tube body. A third channel is formed between the third shuttle wall and the fourth shuttle wall. The head further includes a third mounting wall and a fourth mounting wall. The first mounting wall, the second mounting wall, the third mounting wall, and the fourth mounting wall are distributed along the radial direction of the head. A fourth channel is formed between the third mounting wall and the fourth mounting wall. The proximal end of the third mounting wall is used to dock with the distal end of the third shuttle wall, and the proximal end of the fourth mounting wall is used to dock with the distal end of the fourth shuttle wall, so that the fourth channel communicates with the third channel; Wherein, the inner diameter of the fourth channel is larger than that of the third channel, so that the proximal ends of the fourth mounting wall and the first mounting wall both correspond to the space between the first shuttle wall and the second shuttle wall.

24. A tube body for assembling with an end, the end including a first mounting wall and a second mounting wall, the first mounting wall and the second mounting wall being distributed radially along the end, a second channel being formed between the first mounting wall and the second mounting wall, characterized in that, The tube body includes a first shuttle wall and a second shuttle wall, the first shuttle wall and the second shuttle wall are distributed along the radial direction of the tube body, and a first channel is formed between the first shuttle wall and the second shuttle wall; The distal ends of the first shuttle wall and the second shuttle wall are respectively used to dock with the proximal ends of the first mounting wall and the second mounting wall, so that the first channel communicates with the second channel, and the proximal end of the first mounting wall is used to correspond to the space between the first shuttle wall and the second shuttle wall, so that there is a drop between the proximal end of the first mounting wall and the distal end of the first shuttle wall; The radial distance between point x and point y is e, and the inner diameter of the first channel is f, where e≥f, to eliminate the drop, so that the instrument can enter the second channel from the first channel; Wherein, point x is the proximal end point of the first mounting wall, and point y is on the distal part of the second shuttle wall. Along the axial direction of the tube body, point y is closer to the proximal end of the tube body than point x.

25. The tube body according to claim 24, characterized in that, A second notch communicating with the first channel is provided at the distal end of the second shuttle wall, and the second notch is used to face the first mounting wall, so that the second notch communicates with the second channel, and point y is located in the area corresponding to the second notch.

26. The tube body according to claim 24, characterized in that, The tube body includes a metal wire mesh tube and a multi-channel tube, and the multi-channel tube is sleeved inside the metal wire mesh tube.

27. The tube body according to claim 24, characterized in that, The head further includes a third mounting wall and a fourth mounting wall. The first mounting wall, the second mounting wall, the third mounting wall and the fourth mounting wall are distributed along the radial direction of the head, and a fourth channel is formed between the third mounting wall and the fourth mounting wall; The tube body further includes a third shuttle wall and a fourth shuttle wall. The first shuttle wall, the second shuttle wall, the third shuttle wall and the fourth shuttle wall are distributed along the radial direction of the tube body, and a third channel is formed between the third shuttle wall and the fourth shuttle wall; The distal end of the third shuttle wall is used to dock with the proximal end of the third mounting wall, and the distal end of the fourth shuttle wall is used to dock with the proximal end of the fourth mounting wall, so that the third channel communicates with the fourth channel; Wherein, the inner diameter of the third channel is smaller than that of the fourth channel, so that the proximal ends of the fourth mounting wall and the first mounting wall both correspond to the space between the first shuttle wall and the second shuttle wall.

28. A medical device, characterized in that, Comprising the imaging catheter according to any one of claims 1-13, or the head according to any one of claims 14-23, or the tube body according to any one of claims 24-27.

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